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Multiple Choice Quiz
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Please answer all questions.




1A local telephone network is an example of a _______ network.
A)packet-switched
B)circuit-switched
C)message-switched
D)none of the above



2The local loop has _______ cable that connects the subscriber telephone to the nearest end office.
A)twisted-pair
B)coaxial
C)fiber-optic
D)none of the above



3Data from a computer are _______; the local loop handles _______ signals.
A)analog; analog
B)analog; digital
C)digital; digital
D)digital; analog



4_______ is suitable for businesses that require comparable upstream and downstream data rates.
A)VDSL
B)ADSL
C)SDSL
D)(a) and (b)



5DMT is a modulation technique that combines elements of _______ and _______.
A)FDM; TDM
B)QDM; QAM
C)FDM; QAM
D)PSK; FSK



6The largest portion of the bandwidth for ADSL carries _______.
A)voice communication
B)upstream data
C)downstream data
D)control data



7_______ was designed as an alternative to the T-1 line.
A)VDSL
B)ADSL
C)SDSL
D)HDSL



8HDSL encodes data using _______.
A)4B/5B
B)2B1Q
C)1B2Q
D)6B/8T



9Another name for the cable TV office is the _______.
A)splitter
B)fiber node
C)combiner
D)head end



10A traditional cable TV network transmits signals ______.
A)upstream
B)downstream
C)upstream and downstream
D)none of the above



11In an HFC network, the downstream data are modulated using the _______ modulation technique.
A)PSK
B)QAM
C)PCM
D)ASK



12In an HFC network, the upstream data are modulated using the _______ modulation technique.
A)QAM
B)QPSK
C)PCM
D)ASK



13The standard for data transmission over an HFC network is called _______.
A)MCNS
B)DOCSIS
C)CMTS
D)ADSL



14The original telephone network, which is referred to as the plain old telephone system (POTS), was an ________ system.
A)digital
B)analog
C)digital as well as analog
D)none of the above



15The modern telephone network is now ________.
A)digital
B)analog
C)digital as well as analog
D)none of the above



16The telephone network is made of ______ major components.
A)2
B)3
C)4
D)none of the above



17The United States is divided into many _______.
A)LECs
B)LATAs
C)IXCs
D)none of the above



18The carrier that handles intra-LATA services is called a(n) _____ .
A)POP
B)IXC
C)LEC
D)none of the above



19The carrier that handles inter-LATA services is called a(n) _______.
A)POP
B)IXC
C)LEC
D)none of the above



20In ______signaling, the same circuit is used for both signaling and data.
A)in-band
B)out-of-band
C)mixed
D)none of the above



21In ________signaling, a portion of the bandwidth is used for signaling and another portion for data.
A)in-band
B)out-of-band
C)mixed
D)none of the above



22The protocol that is used for signaling in the telephone network is called ______.
A)POP
B)SSS
C)SS7
D)none of the above



23Telephone companies provide two types of analog services: analog _______ services and analog _____services.
A)switched; in-band
B)out-of-band; in-band
C)switched; leased
D)leased; out-of-band



24The two most common digital services are ________ service and ______.
A)switched/56; switched/64
B)switched/56; DDS
C)DDS; swiched 64
D)leased; out-of-band



25The term modem is a composite word that refers to the two functional entities that make up the device: a signal _______ and a signal _______.
A)modulator; demodulator
B)demodulator; modulator
C)modern; demo
D)none of the above



26Most popular modems available are based on the ________standards.
A)V-series
B)X-series
C)VX-series
D)none of the above



27______technology is a set of technologies develpoed by the telephone companies to provide high data rate transmission.
A)ASL
B)DSL
C)LDS
D)none of the above



28The traditional cable TV system used ________cable end to end.
A)twisted-pair
B)coaxial
C)fiber-optic
D)none of the above



29The second generation of cable networks is called a(n) _________ network.
A)HFC
B)HCF
C)CFH
D)none of the above



30The HFC network uses _______ cable.
A)twisted-pair
B)coaxial
C)fiber-optic
D)a combination of (b) and (c)



31To use a cable network for data transmission, we need two key devices: a ______ and a _________
A)CM; CMS
B)CT; CMTS
C)CM; CMTS
D)none of the above







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